Join Date: Sep 2008
Location: Connecticut, NY, Long Island,New Jersey
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Enigine zincs (anodes)
[QUOTE=preservedkillick;391024]I'm trying to get to know my Vetus 3.10 diesel engine..reading the very multi-language manuals, reading Calder's book playing with parts etc.
I keep reading about how zincs in marine diesel engines, and from what I can tell, my Vetus has none? Can I be wrong? It would seem like such an important part any ferrous part that is near saltwater?[/QUOTE]
I looked at your photographs. Very nice restoration! Did you do the work yourself? On of my favorite classic boats!
To answer your question. I have not worked on your engine type, but a quick google search came up up with a boat that had one. It would appear that your engine is a Mitsubishi engine block and is fresh water cooled based on the that site.
Is your engine original or an upgrade? I looked at the Vetus website and could not find that model. Also is it fresh water cooled (antifreeze in the block cooled via heat exchanger with raw water)? If not it is probably not an issue.
The zinc (if there is one) would be in the heat exchanger in the raw water (salt water) leg. It is there to protect the HE from galvanic corriosion. Now the fun part! You will have to look at your HE and look for what looks like a drain plug on your HE. It may be painted but should look like a brass plug. If you are real lucky you may find the remains of a label. Back it out and see if you have one, there will either be an anode or the remains of one.
Your HE may also have covers on the ends which are removable for inspection of the tubes. If you remove them, on the end where your raw water is injected you may be able to see the inside end of the plug that carries the zinc or the remains of the zinc in this area. With both covers removed you will be able to see through the tubes and see and blockage. Depending on the age of your engine this is not a bad thing to check since you.
To find the zinc trace the hose from your seawater pump to the the HE and look around that end of your HE.
Many newer engines such such as some Yanmars etc. do not have anodes in their raw water circuit because of advances in construction and coatings to prevent corrosion.
Hope that helps.
Again nice boat!
Last edited by JHJensen; 10-27-2008 at 02:26 PM.